Platen printing press



March 26, 1935. A BTTNER 1,995,563 l PLATEN PRINTING PRESS Filed Feb. 8, 1955 2 Sheets-Sheet 1 "j y a 7 zwenipr March 26, 1935. A. BUTTNER 1,995,563

PLATEN PRINTING PRESS Filed Feb. 8, 1955 2 Sheets-Sheet 2 n Patented Mar.` 26, 1935 UNITED STATES( v 1,995,563 Y vPLATEN PRINTING' Prissg Artur Bttner, Heidelberg, Germanmassignort '5? Schnellpressenfabrik Aktiengesellschaft' i Heif delberg,. Heidelberg, Germany is -f In Germany y' l2 claims. (61,.271-5) L This invention relates to a platen printing press having means for automaticallyfeeding and delivering the sheets; the inventionV can be employed in connection with Ysuch platen printingv presses, in which the feeding and delivering device forms a unit with the press, as well as .withV such platen printing presses in which said devices constitute a separate aggregate which is merely attached to the press and operatively 'connected with the same. f Y With all these presses considerable difliculties are encountered in making the attendant quickly versed with the'adjustments and readjustments necessary forproper working of the press. It is well known that the feeding and the delivery pile as Well as the tipping movement ofthe feeding sucker must be regulated with respect to the strength of the sheet to be treated. Thus, for example, the feed of the delivery pile and the tipping of the sucker mustbe Ydifferent with heavy papers than with thin papers. I f I Formerly, considerable diiiculties arose when a change of the paper to be treated required the rapid and correct adjustment of` the necessary parts. Since the result of the various adjustments could not be stated beforehand, and since even after long acquaintance Withthe machine in question, the necessary adjustments could'not be made' with sufficient safety and speed; many try-outs were necessary whenever'the paper was to be changed, and this led to a loss of time and material. Particularly, up to this time, 'nofa'ssurance wasv given' that the tipping o'f the'suckers'asrwell as the movement of the pilewas in treated. OnlyY when both adjustments met the necessary requirements was frictionless opera',- tion and the attainmentof great Workingfcapacity possible.V 'c V Y l The. desired advantages are obtained by this invention.

By means' of this invention',V it is possible evenV for anV unskilled workman; uponv @change of paper to ensure safely and instantaneously the necessary Vadjustment'of the pile and the'tipping sucker to bring them into conformity. "Furthermore, itlis `possible to overcome any. inaccuracies in the adjustment Yduring theoperationof the machine without making any previous' tryouts.

. ,The invention is illustratedk diagrammatically and by Way of example on` the accompanying drawings, on which Figure 1 is a perspective il.- lustration of a platenv printing press designed VVaccording to this invention, the press'V being shown conformity with the strength of` paperY toi be` `in, front-view. kFigureV 2 is a side-view ofthe press seen 'from the rightv where thereis the sheet delivery ideViCa-thiS-gure being., drawn to a' f reduced'scale-relatively to Fig. l. v Figure 3 isa side-,view seenvr-from Vthe left, the scale ,being v largerthan Athat Lof.' Fig., 1.` Figure `4: shows, 5 'chiefly insection, details,` and Figure' 5 isf an en dviewlof these details, seen in the directionfrom the right to `theleftoi Fig. 4. AFor theadjustment of the sucker tipping-over devi ,ce',which adjustments must be diiierent'ac- 10 cording ito'the kindand thel thickness of the sheets tobe printed; a graduated scale 9.-(Figs. 1 and 3) is provided which co-operates` with a pointer 6 formed by thefree endy of a lever 7 'cony nected With the-,mecha nism for `tipping-over the 15v suckersl. V.Adjusting the-degree'of the tippingover Vof the Arod 2 which has the, suckers lattached to itisefected vby turning the knurled nut 3 which isjlocated in the forked end of a member'4 projecting forth'from the frame orV 20 d the"machine. A threaded .spindle 5 passes through said forked t end of memberv 4 and' through. saidnut 3;.andby turning this latter said spindle 5 will be vaxially moved whereby also thelever will be turned, in that it isjointedto 25 the Aupper end of thersaid spindle;V thepointer 6Will, thus,l be moved along the-graduated scale Q 8 denotes' aubolt orupivotcn which the lever '7 is located. VTo the lever 7 is hingedv an arm 10,

the gother endfo-f which -is hinged tol a lever 11. 30 f Y to the word Tissue-paper, -theisucker rod 2 Will 4.0

be ytipped-rearwardlyin the usual manner. The suckersflrdeliver in'knownx manner the sheets to be printedto the Vfeedand delivery grippers 15 that rotate inaA planeparallel to the platen` 14,1 as more clearly described and shown in Letters 45 Patent 1,601,214 and1,653,838;V The position of` the grippersl when they receive the sheets from the suckers 1- is, however, not influenced by the above-mentioned' adjustments, but remains as it had'been.' `For delivering the sheetsY to the grip- 50r pers15-,-the.sucker rod 2 is moved up andn down, as indicated in Fig; 3V in dotted linesl (positions I, IIIID. lWhentherod 2jis moved downwardly; it assumes that position which- .corresponds to the adjustmentat the scale 9.1: I 55 lever 2()r which is loosely supported upon the bolt or pivot 8 that carries also'the lever 7. The leverV 18 witha pointer 19is secured kto-the bolt 2l by y vmeans of a-pin, and'also an eccentric 22 is affixed of the feeler rod 23 on thepile p.' ZWhen theV tot-his bolt 21, but this latter itself .iseturnable in the lever 20. Feeling forlthe heightoffthe pile p is effected by the rod 23 which is xed toa lever 24. A bolt 25 turnably connects this lever 24 with a bearing lhead 26AV secured to the'upper end of a vertically movable rod 27 guided in the i frame of the press. When the eccentric 22, thel position of .which at the time beingis securedby locking rests, is turned by means fof the Ypointer lever 18, 19, an `extension'cftl'ie lever 24 whichV bears uponsaid eccentricwill varytheposition pointer `19 points to the word Card-board on the scale 17`the paper will1 get to thevbottom' face of the suckers 1,' whereas at" adjustment on the scale 17 to Tissue-paper"=a distance of-YaboutV half an inch remains between-fthefupper sheet of the feed pile and the bottom yface 'of' the suckers l, as the thin paper must jump onto the suckers 1, in order to attain a better separation of the Sheets f 1.

The bolt 21 of the pointerlever'l, 19 is loosely engaged by a rod 28 which is movably connected at its lower endl with a double-armed gear lever 3() by a bolt 29. This lever is forked and in this fork isguided the bolt 31 of Ya feed pawl 32 which engages a ratchet wheel 34. The pawl 32 is hinged to a bell-crank lever 33 which is loosely turnable on the shaft 35 of said ratchet wheel 34. The pawl-lever `32, 33 is actuated from a shaft Vof the press, not shown, by means of a'rod 36. The ratchet wheel 34 is xedrto `the shaft Y35 and by gear wheels 351`and 352 the rack 37vfor the feed pile pis moved upwardly, whereas the lrack 38 for the delivery pile p1 is movedv downwardly at the same extent. For the'sakeof security and safety also a counter-pawl 39. for the wheel34 is provided. 40 `denotes a manually operable crank for Y quicklyre-adjusting Vthe'piles 'p and p1, if `rso required. I f.

When the sucker bar2v has been moved downwardly, andzwhen the uppermost sheet has been sucked on, the pile height is felt by means-of the feeler-rod23 and the pawl32'is moved-to and Yfro in. disengaged'position over the ratchet-wheel 34.by.the above-described means, or if again a feed movementis requisitev the pawl 32 engages the wheel 34 and moves thefeed pile p upwardly for a certain short path and the delivery pile p1 downwardly, also for a certain short path.

' y In Fig. V3 the numeral kI shows the position of .the suckers 1 when asheet is vbeing sucked on;

inthe position II the sheet .is delivered over .toy

(not shown). YThis lever 41`is connected by means of a bolt'412 to a casing 42 (Figs. 1 and 3) attached to the vertically movable rod 27 by means of a bolt 43.

In the casing 42 (Figs. 4 and 5) is housed the mechanism for reversing the press to no-load running.v In a bore44 of this casing 42fisshiftable a-fpiston'441 which is subjected to the pressure of a compressive spring 45 that continually tends to press the piston outwardlyV and is normally held in the' position shown in Fig. 4. Into Vtllebore'44 enclosing said spring terminates the suction pipe 46,- the other end of which communicates with the suction pump 47 (Fig. 2), and the branch1S-(Fig. 5) Icommunicates with the sucker rod 2 by means of the pipe 461Y (Fig. l). As long vas a sheetis being sucked on by the suckers 1,

the pressure below atmospheric pressure in the bore4 44, is such a one that the piston 441 is pressed inwardly by the pressure of theatmosphericrrair,'wherebya disengaging lever 49 that is turnable at the casing 42 on a'pivot 50 and is engaged byra pin 443 of the piston rod 442willbe turned in the direction of the casing 42. If,'how

' ever, no sheet is being 'sucked on orir the suckers 1 lose thesheet they have sucked on, the piston r441 is inot. moved inwardly and the disengaging lever 49 pushes when the casing 42 is being'rnoved upwardly against a lever-,'51 (Fig. 3) fixed to a turnable pivot 52. Also a lever 53` is xed to said pivot 52 andcontacts with the manually operable coupling lever 54 thereby `holding the latter in working position. When the disengaginglcver 49 on its upward movementpushes on the lever 51, this latter is turned upwardly. whereby the lever 53v is turned .out of engagement withthe coupling-lever 54Vwhich stands under the action of springs, not shown, and slides now away laterally. `Hereby the driving coupling of theV press is disengaged, whereupon-the machine comes to a stand-Still. n v Y For regulating` the pressure exerted by the spring 45 (Fig. 4) a screw 55 isf provided, as. the

ing speed of the machine and with the size of the sheets to be printed...v j Y Inorder to enable the attendant to effect the various adjustments and readjustrnents quickly,

reliablyV andyefectively, a shield ,56 bearing the requisite informations is provided below the ad- `justing screw 55f. 1 1

For doingV away with the` vacuum in that point of timeV whenaj sheetyis delivered over by the suckers -lto the grippers-15,a passage 57 branching oftfrom the bore 44 is Vprovided and canbe closed by aflap571; this flap is intermittently .opened-bye. rotating-cam 581 (Fig. 5).:acting upon a roller 58 which is providedon-thezrlap 571.

Inforder. to=prevent the machineufrom coming to a standstill when a sheet is lacking, viz. in the case oijrunning-in theginking mechanism, the 'following Aarrangemf-:nt andr combination of. parts has Abeen designed: f, y Y. Y i y l Above-the piston 441 a slide59 having a circum- Vferential groove60 is arranged in the casing 42.

.'fed..- At the other end ofthe slide V59A is a hooklike projection '591; when' this has been movedV to the right (Fig. 4) the".clisengaging"lever 49 will no more pushk upon the lever I when the casing 42 is'being moved upwardlyand the drive coupling of the press remains engaged. VThe pistonl 441 remains then in its position. There'is, by l the provision of the said circumferential groove 60, y prevented that the press can again be-run with fed paper and working printing members Without the automatic disengaging members being Y active whereby printing on the tympan of the `platen is prevented if a disturbance should vhave arisen inthe paper supply. r

In order to enable the attendant to operate in properv manner the device for throwing into, and out of, gear the automatic disengaging device,

there is provided on the grip 61 a shield bearing inscriptions to that effect. 1

l For the adjustment of the cock 64 (Fig. 1)', by

i means of which the supply of the'suction air delivering deviceV are andthe blowing air is regulated, is provided a shield 65 which also bears the proper 'inscriptions. Y Y

For the regulation of the stroke of the pump 47 (Fig-2) is provided a shield 67 which bears also the necessary informations. Another shield 66 gives informations for the adjustment of a vacuum regulating valve 68.`

For the adjustment of the blowing air serving in known manner for depositing the printed sheets on the` delivery pile p1 there are shields 71 and 72 provided on the air-cock l69 and proper manipulation. y

Further statements as to themanipulations to be made Ywhen-regulating the sheet feeding and provided at the places 73, 74, 75, 76 and 77. f

It is a matter of courseV that the shields, scales and levers provided according to this invention at the places concerned can bey arranged also in other manners; it is, however, at all events essential that the members to be employed in feeding and delivering the sheets can be so adjusted with the aid of the inscriptions or statements of on the blow- .ingnozzles 70 and bearing inscription for the said feeler simultaneously up andv down, means for tipping said suckers when feeding the sheet,

, a manually operable stationary lever for adjusting said moving tipping means, and a scale hav- Ving indicia so arrangedrelativelyl to said lever as to facilitate adjustment; a second manuallyoperable stationary lever for adjusting the position of said movingY feeler anda scale having indicia so arranged relatively tosaid second lever as to facilitate adjustment.

2. In av platen printing press, in combination the shields, scales and levers ,orV their equivalents V with means for the automatic feeding and delivl ery of the sheets,V suckers adapted for feedingl the sheets, a gearing for. lifting the feed pile; a feeler adapted to touch theuppersheet of the feed pile and to act upon said gearing forlifting the feed pile; a vertically guided rod for moving said suckers and said feeler simultaneously up and down, a cam lever hinged to said vertically guided rod and adapted for. tipping'said suckers,

:a Vstationary graduated scale, anv adjusting lever having a pointer at one end adapted Vto cooperate with said scale, alink connecting said adjusting lever to said cam lever, and stationary means for turning said adjusting lever; a second stationary graduated scale, a second adjusting lever having l a pointer at onev end'adapted to cooperate with said second scale, and a camturnable by means of Vsaid second adjusting lever and adapted to vary` the position-of said feeler, and .means rfor moving up and down said vertically guidedgrod.

- ARTUR B'ITNER. 

